Basically, yes - there was no contact after their e-mail saying "these things must be expected" ...
We had the girls neutered and found them pet homes as they were fairly young. We thought about "going after" the breeders involved but this usually leaves the novice looking like the bad one because established breeders usually have a strong network of friends and associates that will defend them.
My reply was a more general one to Maddy's question but I notice in your case that the breeder has already replaced two cats due to illness and faults - and now with these fertility issues that you are having, I would seriously ask myself if these are lines I want to begin a (hopefully) life long breeding programme with. It is upsetting and maddening but I, personally, would walk away from this breeder and start with someone trustworthy, honest and reputable. If the breeder were to give in at this point and offer you another couple of cats, would you think they would be there for you this time? Would you want to accept more cats after having twice had issues with their lines?
Also, I see you wrote the breeder has said that she has had problems like this herself. Although I am in no way justifying their actions, it might help a little to see it from their side. If they have had issues like we have had where they were told "these things happen" and she has already replaced two cats for you then she could well be thinking "why should I be the one who bends over backwards when nobody has for me" ... the cat world can be cruel and she may feel that she has already done much more for you than anyone has done for her. I know I have, at times, felt like an idiot for being so helpful with new breeders who do not appreciate the time and cost involved in helping them when I know if they had gone to the "big names" they would have been sold a package and sent on their way. Like I say, that is not to justify her actions, just that a little understanding might ease your anger. Take pity, get cats from stronger lines and meet her on the show bench with your progeny. There is no greater feeling than beating those who spoke ill of you or who screwed you over in the beginning
I hope the situation is resolved for you soon and it hasn't put you off